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article

A Robust Control Scheme Based on Sliding Mode Observer to Drive a Knee‐Exoskeleton

Saber Mefoued, Djamel Eddine Chouaib Belkhiat

Asian Journal of Control > 21 > 1 > 439 - 455

In this paper, a robust control scheme to drive a knee‐exoskeleton has been designed to assist people with limited knee movement. Dynamic modeling and parameter identification of the “subject's lower limb‐exoskeleton” has been performed and a sliding mode observer (SMO) developed and integrated in the system's closed loop to provide velocity. Lyapunov's theory allows demonstration of the stability...

article

Image features and DUS testing traits for peanut pod variety identification and pedigree analysis

Limiao Deng, Zhongzhi Han

Journal of the Science of Food and Agriculture > 99 > 5 > 2572 - 2578

BACKGROUND DUS (Distinctness, Uniformity and Stability) testing of new varieties is an important method for peanut germplasm evaluation and identification of varieties. In order to verify the feasibility of variety identification for peanut DUS testing based on image processing, 2000 peanut pod images from 20 varieties were obtained by a scanner. Initially, six DUS testing traits were quantified...

article

Transient heat stress during tuber development alters post‐harvest carbohydrate composition and decreases processing quality of chipping potatoes

James S Busse, Amy E Wiberley‐Bradford, Paul C Bethke

Journal of the Science of Food and Agriculture > 99 > 5 > 2579 - 2588

BACKGROUND Adverse air and soil temperatures are abiotic stresses that occur frequently and vary widely in duration and magnitude. Heat stress limits productivity of cool‐weather crops such as potato (Solanum tuberosum) and may degrade crop quality. Stem‐end chip defect is a localized discoloration of potato chips that adversely affects finished chip quality. The causes of stem‐end chip defects are...

article

A method to detect allergenic fish, specifically cod and pollock, using quantitative real‐time PCR and COI DNA barcoding sequences

Anne C Eischeid

Journal of the Science of Food and Agriculture > 99 > 5 > 2641 - 2645

BACKGROUND Fish are one of eight major allergens defined in the US Food Allergen Labeling and Consumer Protection Act, and cod and pollock are two of the major fish allergens. This paper describes development and validation of a method to detect cod and pollock in complex food matrices using real‐time polymerase chain reaction (PCR). Mitochondrial cytochrome oxidase I (COI) sequences obtained through...

article

The preparation and antibacterial effect of egg yolk immunoglobulin (IgY) against the outer membrane proteins of Vibrio parahaemolyticus

Bochao Hu, Xiaodong Yang, Erpeng Guo, Peizhan Zhou, more

Journal of the Science of Food and Agriculture > 99 > 5 > 2565 - 2571

BACKGROUND Vibrio parahaemolyticus causes not only various diseases in aquaculture animals but also seafood‐borne illness in humans. Outer membrane proteins (OMPs) are species‐specific proteins found in bilayer membranes of gram‐negative bacteria. Egg yolk immunoglobulin (IgY) has been reported to serve as oral administration of antibodies against bacteria and virus. RESULTS The present research...

article

Modellierung und Simulation von Vollmantelzentrifugen als ein Aspekt der voranschreitenden Digitalisierung in der Fest/Flüssig‐Trennung

Simon Hammerich, Marco Gleiß, Hermann Nirschl

Chemie Ingenieur Technik > 91 > 3 > 215 - 227

Im Zuge der Initiative Industrie 4.0 erhöht sich der Digitalisierungsgrad auch in der Prozessindustrie. Eine enge Verknüpfung von Analyseverfahren und dynamischer Prozessmodelle erlaubt die Optimierung der Prozesskontrolle und Steuerung auch in der industriellen Trenntechnik. Zu diesem Zweck müssen mathematische Modelle zur Beschreibung der Prozessebene in Echtzeit bekannt sein. Im Bereich der Fest/Flüssig‐Trennung...

article

On the Use of Online Reparametrization in Automated Platforms for Kinetic Model Identification

Marco Quaglio, Conor Waldron, Arun Pankajakshan, Enhong Cao, more

Chemie Ingenieur Technik > 91 > 3 > 268 - 276

Parameter estimation algorithms integrated in automated platforms for kinetic model identification are required to solve two optimization problems: i) a parameter estimation problem given the available samples; ii) a model‐based design of experiments problem to select the conditions for collecting future samples. These problems may be ill‐posed, leading to numerical failures when optimization routines...

article

Digitalisierung in F&E

Norbert Asprion, Bernd Eck

Chemie Ingenieur Technik > 91 > 3 > 179 - 179

No abstract.

article

Assembly of the Entire Carbon Backbone of a Stereoisomer of the Antitumor Marine Natural Product Hemicalide

Camille Lecourt, Sabrina Dhambri, Khalil Yamani, Guillaume Boissonnat, more

Chemistry – A European Journal > 25 > 11 > 2745 - 2749

A strategy for the assembly of the entire carbon backbone of a stereoisomer of the antitumor marine natural product hemicalide has been investigated. The devised convergent approach relies on Horner–Wadsworth–Emmons and Julia–Kocienski olefination reactions for the construction of the C6=C7 and C34=C35 double bonds, respectively, an aldol reaction to create the C27−C28 bond, and a Suzuki–Miyaura cross‐coupling...

article

Triticum aestivum ethanolic extract improves non‐alcoholic fatty liver disease in mice fed a choline‐deficient or high‐fat diet

Hyun‐Seok Oh, Woojae Cho, Sang‐Bum Tak, Sukjoon Kim, more

Journal of the Science of Food and Agriculture > 99 > 5 > 2602 - 2609

Background Although non‐alcoholic fatty liver disease (NAFLD) has become more prevalent with the rapid increase of obesity worldwide, no specific treatment has been developed. Several studies have shown that wheatgrass extract Triticum aestivum (TA) improves lipid metabolism. In the present study, we evaluated the efficacy of GM‐T (an ethanolic TA extract) in a murine NAFLD model. Mice were separated...

article

An Adaptive Passivity‐Based Controller of a Buck‐Boost Converter with a Constant Power Load

Wei He, Romeo Ortega, Juan E. Machado, Shihua Li

Asian Journal of Control > 21 > 1 > 581 - 595

This paper addresses the problem of regulating the output voltage of a DC‐DC buck‐boost converter feeding a constant power load, which is a problem of current practical interest. Designing a stabilising controller is theoretically challenging because its average model is a bilinear second order system that, due to the presence of the constant power load, is non‐minimum phase with respect to both states...

article

Front Cover: Matrix Coordination Induced Emission in a Three‐Dimensional Silver Cluster‐Assembled Material (Chem. Eur. J. 11/2019)

Zhong Wei, Xiao‐Hui Wu, Peng Luo, Jia‐Yin Wang, more

Chemistry – A European Journal > 25 > 11 > 2645 - 2645

Matrix coordination induced emission was observed in a three‐dimensional, silver–chalcogenolate, cluster‐based metal–organic framework. The rigidifying method not only enhances the fluorescence of the aggregation‐caused quenching molecule in the aggregated state, but also strengthens the silver cluster in an unstable state. More information can be found in the Full Paper by K. Li, S.‐Q. Zang et al...

article

Cyclooctatetraene: A Bioactive Cubane Paradigm Complement

Hui Xing, Sevan D. Houston, Xuejie Chen, Sussan Ghassabian, more

Chemistry – A European Journal > 25 > 11 > 2729 - 2734

Cubane was recently validated as a phenyl ring (bio)isostere, but highly strained caged carbocyclic systems lack π character, which is often critical for mediating key biological interactions. This electronic property restriction associated with cubane has been addressed herein with cyclooctatetraene (COT), using known pharmaceutical and agrochemical compounds as templates. COT either outperformed...

article

Evaluation of total phenolic content in virgin olive oil using fluorescence excitation–emission spectroscopy coupled with chemometrics

Giacomo Squeo, Francesco Caponio, Vito M Paradiso, Carmine Summo, more

Journal of the Science of Food and Agriculture > 99 > 5 > 2513 - 2520

Background Determination of the total phenolic content (TPC) in olive oils is of great interest, as phenolic compounds affect the health benefits, sensory attributes and oxidative stability of olive oils. The aim of this study was to explore the feasibility of direct front‐face fluorescence measurements coupled with chemometrics for developing multivatiate models for discrimination between virgin...

article

Efficacy of yeast starters to drive and improve Picual, Manzanilla and Kalamàta table olive fermentation

Maria Tufariello, Chiara Anglana, Pasquale Crupi, Ivan Virtuosi, more

Journal of the Science of Food and Agriculture > 99 > 5 > 2504 - 2512

BACKGROUND Table olive fermentation is an unpredictable process and frequently performed using traditional practices often inadequate to obtain products with acceptable quality and safety standards. In the present study, the efficacy of selected yeast strains as starters to drive fermentations of green and black table olives by the Greek method was investigated. Pilot‐scale production by spontaneous...

article

Mesopore Engineering for Well‐Defined Mesoporosity in Al‐Rich Aluminosilicate Zeolites

Dazhi Zhang, Changzi Jin, Mingming Zou, Shengjun Huang

Chemistry – A European Journal > 25 > 11 > 2675 - 2683

Desilication has been proven an effective approach for the construction of well‐defined hierarchical porosities inside zeolites with an optimal framework Al content (Si/Al=25–50). However, for the Al‐rich aluminosilicate zeolites, desilication is constrained by the excess and extensive shielding effects from high Al‐contents. The developments in the desilication of siliceous zeolites convey a simplified...

article

Improving the Halogen–Magnesium Exchange by using New Turbo‐Grignard Reagents

Dorothée S. Ziegler, Baosheng Wei, Paul Knochel

Chemistry – A European Journal > 25 > 11 > 2695 - 2703

This Minireview describes the scope of the halogen–magnesium exchange. It shows that the use of the turbo‐Grignard reagent (iPrMgCl⋅LiCl) greatly enhances the rate of the Br– and I–Mg exchange. Furthermore, this magnesium reagent allows the performance of a fast sulfoxide–magnesium exchange. Also, the use of sBuMgOR⋅LiOR (R=2‐ethylhexyl) enables a Br–Mg exchange in toluene leading to various Grignard...

article

Radical‐Type Reactivity and Catalysis by Single‐Electron Transfer to or from Redox‐Active Ligands

Jarl Ivar van der Vlugt

Chemistry – A European Journal > 25 > 11 > 2651 - 2662

Controlled ligand‐based redox‐activity and chemical non‐innocence are rapidly gaining importance for selective (catalytic) processes. This Concept aims to provide an overview of the progress regarding ligand‐to‐substrate single‐electron transfer as a relatively new mode of operation to exploit ligand‐centered reactivity and catalysis based thereon.

article

N‐Boc‐Amides in Cross‐Coupling Reactions

Yann Bourne‐Branchu, Corinne Gosmini, Grégory Danoun

Chemistry – A European Journal > 25 > 11 > 2663 - 2674

Since 2015, the use of amides as electrophilic partners in cross‐coupling reactions has experienced exponential growth. Diverse amide derivatives have been studied and among them N‐Boc‐amides have shown good activities towards various cross‐coupling reactions and presents, in our view, an important synthetic usefulness. This review describes the recent developments of these chemical transformations...

article

Synthesis and characterization of compatibilizers for blends of polypropylene carbonate and polybutylene succinate via free‐radical grafting of maleic anhydride

Bárbara A. Calderón, James Soule, Margaret J. Sobkowicz

Journal of Applied Polymer Science > 136 > 21 > n/a - n/a

This study focuses on creating an optimal grafting compatibilizer for blends of polypropylene carbonate (PPC) and polybutylene succinate (PBS). PPC and PBS were blended separately with different amounts of maleic anhydride (MAH) and with and without dicumyl peroxide (DCP) to aid the free‐radical grafting. Titration analysis evidenced that MAH reacted with the polymers terminal groups and backbones...

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A Robust Control Scheme Based on Sliding Mode Observer to Drive a Knee‐Exoskeleton

Image features and DUS testing traits for peanut pod variety identification and pedigree analysis

Transient heat stress during tuber development alters post‐harvest carbohydrate composition and decreases processing quality of chipping potatoes

A method to detect allergenic fish, specifically cod and pollock, using quantitative real‐time PCR and COI DNA barcoding sequences

The preparation and antibacterial effect of egg yolk immunoglobulin (IgY) against the outer membrane proteins of Vibrio parahaemolyticus

Modellierung und Simulation von Vollmantelzentrifugen als ein Aspekt der voranschreitenden Digitalisierung in der Fest/Flüssig‐Trennung

On the Use of Online Reparametrization in Automated Platforms for Kinetic Model Identification

Digitalisierung in F&E

Assembly of the Entire Carbon Backbone of a Stereoisomer of the Antitumor Marine Natural Product Hemicalide

Triticum aestivum ethanolic extract improves non‐alcoholic fatty liver disease in mice fed a choline‐deficient or high‐fat diet

An Adaptive Passivity‐Based Controller of a Buck‐Boost Converter with a Constant Power Load

Front Cover: Matrix Coordination Induced Emission in a Three‐Dimensional Silver Cluster‐Assembled Material (Chem. Eur. J. 11/2019)

Cyclooctatetraene: A Bioactive Cubane Paradigm Complement

Evaluation of total phenolic content in virgin olive oil using fluorescence excitation–emission spectroscopy coupled with chemometrics

Efficacy of yeast starters to drive and improve Picual, Manzanilla and Kalamàta table olive fermentation

Mesopore Engineering for Well‐Defined Mesoporosity in Al‐Rich Aluminosilicate Zeolites

Improving the Halogen–Magnesium Exchange by using New Turbo‐Grignard Reagents

Radical‐Type Reactivity and Catalysis by Single‐Electron Transfer to or from Redox‐Active Ligands

N‐Boc‐Amides in Cross‐Coupling Reactions

Synthesis and characterization of compatibilizers for blends of polypropylene carbonate and polybutylene succinate via free‐radical grafting of maleic anhydride

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